Description
Hexagonal hollow stopper NS 10/19 in borosilicate glass 3.3 provides a secure, chemically resistant closure for standard ground-joint glassware. Manufactured to DIN 12252, the stopper incorporates a securing groove that accepts a retainer or clip, reducing the chance of accidental loosening under slight pressure changes or vibration. The hollow design keeps mass low while the hexagonal head offers a firm grip for insertion and removal, even when gloves are worn. Borosilicate glass 3.3 delivers excellent thermal shock resistance and broad chemical compatibility with aqueous media, organic solvents and mild acids or bases commonly encountered in laboratory work. Ideal for sealing flasks, adapters and reaction vessels fitted with NS 10/19 joints, this stopper from manufacturer Witeg supports routine synthesis, storage and distillation assemblies. Supplied as a single piece, it integrates cleanly into existing ground-joint systems without adapters.
This article is part of Ground-joint glass stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Joint size: NS 10/19
- Material: Borosilicate glass 3.3
- Design: Hexagonal hollow stopper
- Feature: Securing groove
- Standard: DIN 12252
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Questions about hollow stoppers ST 10/19 hexagonal Boro
What is this article?
hollow stoppers ST 10/19 hexagonal Boro is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Ground-joint glass stoppers, inside Stoppers, caps & closures, in Labware.
A ground-glass stopper matches a ground neck of a stated joint size. A 14/23 stopper does not seal a 29/32 neck. The stopper is part of the flask's seal, and a chip on the grind is a leak.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Ground-joint glass stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Lids & seals and Closures (other).
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
